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27 of 33 (82%) achievements earned:

Personal Achievements
 
Unlocked Sep 22, 2012 @ 6:53am

Defiant

Hit the trashcan cop with the can.
Unlocked Sep 22, 2012 @ 7:07am

Malcontent

Escape the apartment block raid.
Unlocked Sep 22, 2012 @ 7:20am

Trusty Hardware

Get the crowbar.
Unlocked Sep 22, 2012 @ 9:04am

Anchor's Aweigh!

Get the airboat.
Unlocked Sep 22, 2012 @ 2:27pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked Sep 22, 2012 @ 2:39pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked Sep 22, 2012 @ 2:57pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked Sep 22, 2012 @ 2:57pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked Sep 22, 2012 @ 3:07pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked Oct 1, 2012 @ 2:45pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked Oct 1, 2012 @ 1:37pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked Oct 5, 2012 @ 3:04pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked Oct 5, 2012 @ 3:32pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked Oct 2, 2012 @ 3:09am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked Oct 6, 2012 @ 8:12am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked Oct 5, 2012 @ 5:07pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked Apr 20, 2014 @ 6:51pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked Oct 6, 2012 @ 8:42am

Flushed

Kill an enemy with a toilet.
Unlocked Apr 27, 2014 @ 2:26pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked May 1, 2014 @ 1:07pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked May 1, 2014 @ 1:59pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked May 1, 2014 @ 2:47pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked May 2, 2014 @ 12:57pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked May 2, 2014 @ 1:58pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked May 2, 2014 @ 2:56pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked May 2, 2014 @ 3:24pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked May 2, 2014 @ 4:08pm

Singularity Collapse

Destroy the Citadel's reactor core.



What cat?

Break the mini-teleporter in Kleiner's lab.

Barnacle Bowling

Kill five barnacles with one barrel.

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Lambda Locator

Find all lambda caches in Half-Life 2.

Hack Attack!

Kill five enemies with a Manhack.
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